Bulgarian split squat

Take the time, build the single leg strength, and pistols will come, too.
To build a balanced, strong, injury-proof physique you need to do some unilateral training.
Exercise variations to do at-home using household items because simplicity and resourcefulness are better than excuses.
Knock out all these exercises in this order to really feel each muscle of your legs come alive in new ways.
If the squat is troublesome for you, the best alternative exercises to consider are exercises that mimic either the joint action or muscle groups involved in the squat.